Property, Equipment and Leasehold Improvements (Detail) - USD ($) $ in Thousands	Jan. 01, 2016	Jan. 02, 2015
Property:
Land	$ 4,450	$ 4,450
Buildings	35,817	35,570
Construction in progress	1,457	12
Equipment:
Machinery and equipment	37,520	35,131
Office furniture and equipment	7,824	7,714
Leasehold improvements	13,580	13,169
Property, Plant and Equipment, Gross, Total	100,648	96,046
Less accumulated depreciation and amortization	72,163	67,782
Property, equipment and leasehold improvements, net	$ 28,485	$ 28,264